9 Automatic vacuum control devices, namely, automatic valves; Scientific leak detectors for determining water content in petroleum products; Mechanical coding devices, namely, magnetic encoders; Automatic control devices, namely, automatic liquid-flow control machines; Gas flow control devices, namely, control valves for regulating the flow of gasses; Programmable control devices, namely, programmable pressure controllers for controlling the pressure of liquid, semi-liquid, and gaseous substances in industrial processes; Detection devices, namely, leak detectors for vacuum pumps, radiation detectors; Automatic dosing devices, namely, dosage dispensing machines for measuring and dispensing portions of fluids, not for medical use; Volumetric measuring devices, namely, sensors for measuring fluid volume for the oil industry; Regulating and control apparatus, namely, pressure regulators for gas lines and pipes, automatic valves for controlling the flow of oil in pipelines; Uninterruptible power supply apparatus; Regulated power supply apparatus; Detection apparatus and instruments, namely, fire and smoke detectors, ultrasonic flaw detectors; Electrical devices for processes control, namely, pressure controllers for controlling liquid and gas pressure in industrial processes; Gas detectors for detecting the presence of gas; Electric power-line transmission machines and apparatus; Electric valves thermionic; Electric control valves